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https://issues.apache.org/jira/browse/SPARK-4272?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14200160#comment-14200160
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Apache Spark commented on SPARK-4272:
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User 'chenghao-intel' has created a pull request for this issue:
https://github.com/apache/spark/pull/3136
> Add more unwrap functions for primitive type in TableReader
> -----------------------------------------------------------
>
> Key: SPARK-4272
> URL: https://issues.apache.org/jira/browse/SPARK-4272
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Reporter: Cheng Hao
> Priority: Minor
>
> Currently, the data "unwrap" only support couple of primitive types, not all,
> it will not cause exception, but may get some performance in table scanning
> for the type like binary, date, timestamp, decimal etc.
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